Surname Kouwenaar (Kouwenaar 
) , all around the world, is a very rare family name. The family name Kouwenaar is habitual in Netherlands, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kouwenaar | United States, Netherlands |
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jeanne kouwenaar-bijlo Dutch sculptor (1915-2000), NL (b. 1915) |
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gerrit kouwenaar Dutch writer (1923-2014), NL (b. 1923) |
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| willem kouwenaar university teacher, NL (b. 1891) |
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| david kouwenaar Dutch painterand draftsman (1921-2011), NL (b. 1921) |
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